William h



net shown', Inrwiu be geen that by this nrangement of passageways in the plate, the

t heating and cooling fluid will pass in a tortuous passage througlietlieL plateevenlygiving off orabsorbingheat between the points.

. plate and that there are no joints likely to at which the Huidl supply is 'connected to the become loose under the stresses of contraction and expansion. i* l 1 -WhileI have shown my invention in but one fournit will be obvious to `tlioseskilled-in the artthat it is rnot so limited but is susceptible i Vof various other changes and modifications I ters Patentis:

Y 1. A hot plate -or presses comprising a 4metallic plate having twofduc'ts drilled therein',l one end of one of said ducts being enlarged toA provide a socket7 a cross passage- Waydrilled from the bottomof this-socket at an angleito the ducts7 to the second duct,

and-closure means vfor the mouth f of the socket. l Y

:2. A vheating platen comprising a thin- Walled metal plate having parallel crosspassages in relatively f close arrangementwith certain of said, passages4 extending to atleast one edge of the platen and short diagonal passages yconnecting pairs 'of :said cross Vpassages and extending only from a point where one of 'said through the e ge of the platen to an adjacent airsf of cross passages vopen* cross-passage, in combination With means for closing the'open ends of said cross passages.

WILLIAM H. APPLEBY'.; 

